package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    //分类条件分页查询
    public PageResult findByPage(CategoryPageQueryDTO categoryPageQueryDTO){
        PageHelper.startPage(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());
        List<Category> categoryList=categoryMapper.findByPage(categoryPageQueryDTO);
        Page<Category> p=(Page<Category>) categoryList;
        return new PageResult(p.getTotal(),p.getResult());
    }

    //新增分类
    public void add(CategoryDTO categoryDTO){
        Category category=new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        category.setStatus(StatusConstant.DISABLE);
//        category.setCreateTime(LocalDateTime.now());
//        category.setUpdateTime(LocalDateTime.now());
//        category.setCreateUser(BaseContext.getCurrentId());
//        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.add(category);

    }

    //启用和禁用分类
    public void status(Integer status,Long id){
        Category category=new Category();
        category.setStatus(status);
        category.setId(id);
        categoryMapper.update(category);
    }

    //修改分类
    public void update(CategoryDTO categoryDTO){
        Category category=new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        //分类状态默认为禁用状态0
        category.setStatus(StatusConstant.DISABLE);
//        category.setUpdateTime(LocalDateTime.now());
//        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.update(category);
    }

    //删除分类
    public void delete(Long id) {
        Integer dishCount = dishMapper.countByCategoryId(id);
        // 判断当前分类是否关联了菜品，如果关联了，则无法删除
        if(dishCount>0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        Integer setmealCount = setmealMapper.countByCategoryId(id);
        // 判断当前分类是否关联了套餐，如果关联了，则无法删除
        if(setmealCount>0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        categoryMapper.delete(id);
    }

        //根据类型查询分类
        public List<Category> list(Integer type) {
            List<Category> categoryList = categoryMapper.list(type);
            return categoryList;
        }

}
